I am a self admitted spaz. I would not have them together in a rack nor would I have them around the others. I would in fact have tubs all over the place. It gets complex as it is a lot of T-stats and extra gear. I would suggest a min of 6 months and that is with tests. I would say a fecal is required. A blood screen is a good idea, and IBD and OPMV tests should also be considered.